Chain.



H. GOGKSHAW.

CHAIN.

APPLICATION FILED APR. 29, 1913.

Patented July 7, 1914.

HERBERT oocKsHAW, ror NEW YORK, N. Y.

CHAIN.

Specification of Letters Patent.

Patented July 7, 1914.

Application inea April 29, i913. serial No. 764,308. v

To all whom it may concern:

Be it known that I, HERBERT CoCKsHAw, a citizen of the United States,residing at New York city, in the county of Kings and State of New York,have invented new and useful Improvements in Chains, of which thefollowing is a specification.

This invention relates to chains and the like and has for its objectsthe production of a device having rigid sections closely linkedtogether, the production of a chain which is very flexible and which atthe same time does not kink, and the production of a chain which isextremely strong and durable.

The invention in its application to chains embodies many advantages overheretofore known chains having hollow rigid sections linked together,where small split rings suffice for the links. These rings are linkedand soldered to the ends of adajacent tubes, but because of therelatively small surface contact they have with the tubes they areeasily broken. These rings also project beyond the ends of the tubes toa detrimental extent, in that they thus allow considerable longitudinalplay between the tubes, and in that they present parts which may becomecaught upon clothing and other objects and be easily bent and broken.Furthermore, because of their construction these chains do not presentas pleasing appearance as chains made in accordance with the presentinvention.

This invention is herein described in its application to chains forjewelry and the like, but is, of course, not necessarily limitedthereto, as it is applicable to all devices of the hollow section typeto be coupled.

In the accompanying drawings showing one form of a specic embodiment ofthe invention, Figure 1 is a plan view of a tubular watch chain; andFig. 2 is a similar view partly in section on an enlarged scale.

Referring to the drawings, element 1 represents the sections of chain tobe linked, here shown as thin tubes. .Each such section is swaged orbulged at its ends, as indicated at 2, to form seats or spaces for thereception of ends of linking means of an adjacent section. The innerdiameters of the bulged parts 2 should approximately correspond to theouter diameters of the links 3, as shown. The linking member consists ofsections of metal having loops or heads 3 and arms -l and 5 ofconsiderable length, preferably at least longer than the diameter of thehead 3.

The loops 3 are larger in diameter than the tubey sections 1 where thearms engage it (preferably of diameter approximately equal to the outerdiameter of the tubes), and these arms are a sufficient distance apartto contact with the inner walls of the tube. Arms t and 5, after beinginterlocked, are firmly. secured in place by solder 6, or otherwise,which is shaped at the ends of the tube to correspond to the contour ofa loop of an adjacent tube. By making these arms of a` relatively longlength, there is provided a long and large contact area between the arms4 and 5 and the solder and wall of the tube 1, so that a very strongconnection may be made and these arms serve to reinforce the tubes to agreat extent. The curved end of the solder, indicated at 7, togetherwith the shape of the tube ends, allows the tube sections to be veryclosely connected, in fact, closer than is shown in Fig. 2, which isexaggerated slightly for clarity of presentation. The bulged ends 2 ofthe tubes serve to house the loops 3 and also permit making the loops ofsufficient size to secure considerable swivel action between thesections. The exact shape and size of the sections and` linking means isimmaterial. The tubes may be square, octagonal or any cross-section, andthe material of the sectionsl and linking members may be varied at will,as, for instance, when it is desirable to produce mechanical chains ofsteel, copper or iron, in which event the links may be riveted, solderedor otherwise secured in position.

What I claim is 1. A chain comprising hollow sections longitudinallylinked together by interlocking links having portions secured to theinside of said sections and enlarged portions partly seated in the endsof said sections, and means for securing said portions inside saidsections.

2. A chain comprising hollow sections having enlarged ends, linkingmeans consisting of spaced arms positioned inside said sections andloops of larger diameter extending without said sections, said linkingmeans being shaped to conform to said ends, and means for securingthespaced arms in said sections.

3. A chain comprising hollow sections having enlarged ends, linkingmeans consisting of spaced arms positioned inside said sections andloops of larger diameter extending without said sections, said linkingmeans being shaped to conform to said ends, and means for securing thespaced arms in said sections, saidlast mentioned means being shaped toconform to said ends whereby sald sections may be closely linked.

nal linked sections, linking means between the sections havinginterlocking looped ends, and means .for securing the looped ends inplace, said means being shaped to conformto the said ends, whereby thesaid sections may be. closely linked. o i

'5. A chain comprising hollow sections 'the said sections may be closelylinked. V4. A chain comprising hollow flongitudif' 'having enlargedvends, means `between'such l5 sections having interlocking looped ends,and means for securing the looped ends in place, said last mentionedmeans being shaped to conformi to the said ends, whereby 20 In witnesswhereof I have hereunto at" iXed my signature in the presence of wit-IleSS'eS.

HERBERT COGKSHAW.

l Witnesses:

l HERMAN GUsTow,

ALFRED M. HoUeH'roN.

Copies of this patent may be obtained for ve cents ;each,.by addressingthe Commissioner of Patents,

i Washington, D. C. i f

